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Finding the Fourth Proportional to 15,985,910.80, 23,978,866.20 and 11,199,005.20

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Solution

The fourth proportional to 15,985,910.80, 23,978,866.20 and 11,199,005.20 is: 16,798,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,985,910.80 : 23,978,866.20 = 11,199,005.20 : x
  2. Step 2: Convert to fraction form
    15,985,910.80/23,978,866.20 = 11,199,005.20/x
  3. Step 3: Cross multiply
    15,985,910.80x = 23,978,866.20 × 11,199,005.20
  4. Step 4: Simplify right side
    15,985,910.80x = 268,539,447,263,904.22
  5. Step 5: Solve for x
    x = 268,539,447,263,904.22/15,985,910.80
  6. Step 6: Final answer
    x = 16,798,507.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.